Add spec on labels validation

spec/models/label_spec.rb

@@ -5,4 +5,27 @@ describe Label do
   it { label.should be_valid }
 
   it { should belong_to(:project) }
+
+  describe 'Validation' do
+    it 'should validate color code' do
+      build(:label, color: 'G-ITLAB').should_not be_valid
+      build(:label, color: 'AABBCC').should_not be_valid
+      build(:label, color: '#AABBCCEE').should_not be_valid
+      build(:label, color: '#GGHHII').should_not be_valid
+      build(:label, color: '#').should_not be_valid
+      build(:label, color: '').should_not be_valid
+
+      build(:label, color: '#AABBCC').should be_valid
+    end
+
+    it 'should validate title' do
+      build(:label, title: 'G,ITLAB').should_not be_valid
+      build(:label, title: 'G?ITLAB').should_not be_valid
+      build(:label, title: 'G&ITLAB').should_not be_valid
+      build(:label, title: '').should_not be_valid
+
+      build(:label, title: 'GITLAB').should be_valid
+      build(:label, title: 'gitlab').should be_valid
+    end
+  end
 end